wǒmen yìbiān kàn diànyǐng, yìbiān hē chá.

Avoid combining 在 with this pattern; 一边…一边… already implies “while/at the same time.” Use either:

• 我们一边看电影，一边喝茶 (preferred), or
• 我们在看电影，同时喝茶 / 我们在看电影的同时喝茶 (use 同时 instead of 一边).

Chinese uses time words, not tense. Put time expressions before the verb phrases (ideally before the whole pattern if they apply to both actions):

• 昨天我们一边看电影，一边喝茶。
• 现在我们一边看电影，一边喝茶。
• 周末我们一边看电影，一边喝茶。

Place the negative before the verb:

• Habitual/neutral negation: 我们一边看电影，一边不说话。
• Prohibition: 别一边看电影，一边说话。 Using 没 is for “did not” (past/non-occurrence) and isn’t typical with this simultaneous pattern.

No. 一边…一边… assumes the same subject for both actions. If subjects differ, use separate clauses:

• 我们看电影，他们喝茶。
• 我们看电影的同时，他们在喝茶。

Yes, with slightly different flavors:

• 的时候: 我们看电影的时候喝茶 (when we watch movies, we drink tea). Asymmetric; emphasizes “drinking tea” during the time of watching.
• 同时: 我们看电影，同时喝茶 (more formal/written).
• 边…边…: 边看电影，边喝茶 (short, colloquial).
• 一面…一面…: more literary.
• 又…又…: commonly for adjectives or listing actions (e.g., 又唱又跳), but it doesn’t highlight simultaneity as explicitly as 一边…一边….

Put shared time/place before the whole pattern:

• 我们晚上在家一边看电影，一边喝茶。 Avoid 我们一边在家看电影，一边喝茶, because 在家 then modifies only the first action.

As an activity, 看电影 doesn’t use a measure word. When counting, use 部:

• 看一部电影 (watch a movie) Avoid 看一个电影.

Don’t stack three 一边. Add a third action with 还/也:

• 我们一边看电影，一边喝茶，还吃点心。